Gas-burner for coal-ovens



H. LANGE.

GAS BURNER FOR COAL OVENS.

APPucATloN F1150 1111111.19, 1919.

Patented June 17, 1919.

2 SHEETS-SHEET l.

W1 TNESS:

HTOR.

/1TTORNEY5 H. LANGE:v

GAS BURNER FUR COAL OVENS.

APPLICATION FILED MAII. I9. 1919.

ll?. PaIenIeII June 17, 1919.

2 SHEETS-SHEET 2.

WITNESS:

FFIFE.

HENRY LANGE, 0F QUINCY, ILLINOIS.

GAS-BURNER FOR COAL-OVENS.

To all whom it may conce/m.'

Be it known that I, HENRY LANGE, a citizen of the United States, residing at Quincy, in the county of Adams and State of Illinois, have invented certain new and useful Improvements in Gas-Burners for Coal-Ovens; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates generally to stoves, and more especially to ovens, it being the primary object of the invention to provide a gas burner to be used in the bottom of the oven of a coal stove or range, in order that either coal or gas can be used for heating the oven.

The object of the invention is the provision of a gas burner assembled with the oven bottom in a novel and improved yet simple and effective manner in order that perfect heating will result when using either coal or gas as fuel, the construction and arrangement of parts being such that the oven bot-- tom will be effectively heated when coal is used, so as to avoid irregular heating or baking of an object on the oven bottom over the burner.

It has been found in practice, that stoves orranges of this general character, having gas burners at the bottoms of the ovens, result ,in imperfect heating or baking, due to the fact that the provisionof air inlet means for the burner, resultsin-the air cooling'Y a portion of the oven bottom, when coal is used asL fuel, so that a pan resting Aon `the oven over the burner, will result in a spot being produced on the article over the burner, due to imperfect heating.`- Thus, the

chilled or cooled portion over which the pan rests, will chill the article inthe'pan over the cool portion of the bottom, thus resulting in slow baking or heating overthis point, leaving a white or light spot on the article. This objection is overcome by the present improvements which permit the products off combustionto pass under the oven to heat the pan within the outline of the burner.

A furtherfobject is the provision of anV oven bottom having a recess ordepression for the-gas burner, and means within the burner fortransmittingthe heat from the products of combustion to the `bottom portion of the oven surrounded by the burner,

Specification of Letters Patent. Patented Jun@ Iii', T9199. Application filed March 19, 1919. serial No. 2832482. I

construction and arrangement of parts here inafter describedand claimed, it being understood that changes can be made within the scope of what is claimed without departing from the spirit of the invention.

' The invention is illustrated in the accompanying drawings, Wherein:-

Figure l is a front View of a coal stove or range, showing the oven door removed, and the gas burner in dotted lines.

Fig. 2 is an enlarged longitudinal vertical section through the oven bottom and burner.

Fig. 3 is a section on the line 3 3 of Fig. 4.

Fig. 4 is a plan view of the oven bottom showing the burner, a portion of the cover plate being broken away.

A conventional form of stove or range is shown inthe drawings, having the usual oven l provided with the bottom 2 under which the Hue 8 extends for the passage of the products of combustion around the oven and underneath same to the outlet 4 leading to the outlet flue or pipe 5. In using gas for heating the oven, the back wall ofthe oven lis provided with Ventilating openings 6 near the top ofthe oven leading to the flue or pipe 5, thereby permitting the products of combustion from the burner to pass off to the chimney.

In carryin out the invention, the oven bottom 2, whichv is preferably a cast plate, is provided with an annular recess or depression 7, and, as shown, this recess, is enlarged at one point, as at 8, and provided with a side opening 9 for the entrance of the gas miXingtube or pipe 10. This pipe 10 extends through the flue 3 and side wall of the stove and is provided at its outer end with an air mixer l1 and controlling valve 12 connected to the gas supply pipe 13. The oven bottom is provided within the annularrecess or trough 7 with spider having the central hub or boss 14 with an opening therein,

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and thewradial channeled arms 15 connecting the inner wall of the recess 7 and the boss 14, and the upper flues'or channels of said arms communicate at their inner ends with the opening of the boss and at their outer ends with the annular channel of the recess 7.

The gas burner 16 is of annular form to seat within the recess 7, and is hollow, being provided at one point with a boss 17 within the enlarged portion 8 of the recess for the connection of the mixing tube 10, to supply the gas into the chamber of the burner. The top 18 of the burner slopes inwardly on a curved line, and is provided with gas outlet apertures 19. This burner is slightly below the surface of the oven bottom so as not to present an obstruction in the oven.

A cover plate or disk 20 is seated on the spider rand is fastened down by means of screws 21 or' the like extending downwardly through the plate :20 and threadedly engaging the spider, as seen in Fig.- 2. This plate 20 covers the opening of the boss 1l, the channels of the arms 15, and also the openings 22 between the arms of the spider. The plate 2O is fiush with the oven bottom and constitutes a part thereof, with the burner located belowv the annular space between the plate 20 and edge of the oven bottom at the outer wall of the recess 7. By the provision of the spider having the openings 22 extending `to the plate 20, the products of combustion, when coal is used as fuel, can pass upwardly within the spider to contact with the plate 20, thus keeping said plate heated, the same as the oven bottoni 2, so that an object placed on the oven bottom over the burner f will be heated substantially uniformly throughout its area. Thus, even though the provision of the fresh air inletV under the burneris made, the plate 20 will be heated when coal is used, to avoid a cold spot in the oven bottom within the oven burner, as is an objectionable feature to structures of this general kind heretofore used. The `plate 2O also acts as abaffle for the inflowing fresh air, deflecting the same to vflow radially from the opening of the boss 14; through the channels 15 to the burner, and in this connection the margin or edge portion of the plate 20 extends beyond and overhangs the inner wall of thc recess 7 and inner portion of the burner 1G, thus directing the air against and outwardly across the top of the burner to the. apertures 19, providing for a perfect mixture of the air with the flames or jets'. As shown, the edge of the plate 2() has a lower bead 23 over the sloping surface of the gasburner, to direct the air against said sloping surface in order that Vit will be forced outwardly to the apertures 19, `instead of escapingupwardly past the edge of the plate.

Fresh air is admitted by way of a verticalair tube 24 within the flue 3 having a'slip connection 25 with the boss 1li, and having its lower end extending through an opening 26 provided in the bottom 29 of the stove. As will be apparent, fresh air can therefore flow upwardly Athrough the tube 21 to pass through the channels 15 to the burner.

The tube 24 is cast integral with a parti-V tion or baille 27 extending rearwardly to the back wall of the stove, to compel the products of combustion within the flue 3 to flow forwardly` around the tube 2i before passing through the outlet 4, thus uniformly heating the oven bottoni throughout its area. l

The upper and lower edges of the partition 27 are shaped to fit the oven bottom 2 and stove bottom 29, the upper edge being recessed, as at 2S, to fit under the depressed portion or recess 7 and spider.

Vit-h the present construction as illustrated and described, the oven canbe heated effectively both with the use of coal and and objections incident to burners heretoforel used are overcome. It will also be noted that the plate 20 in'overhanging the burner 16, will prevent it from being lifted out of the recess 7, and the bead 23 will serve to distribute the air along the edge of theA plate from the outer ends of the channels, 15. By

unscrewing the mixing tube 10 from the 9 burner, and removing the plate 20, the burner can be readily lifted fromthe oven bottom, for purpose of cleaning, repair vor Y replacement. It is also to be noted that theA recess 7 and spider are cast integral with the oven bottom 2, and the burner 16, plate 2G and tube 24 with its partition 27 are readily cast from metal, thus providing a simple construction which can be easily manufactured and assembled.

Having thus described the invention, what is claimed as new is 1. An oven bottom having an opening, a plate over said opening substantially flush with the bottom,a gas burner located between said plate and bottom, and means for the entrance of air upwardlyto and alongl the under side of said plate to the burner, said opening exposing said plate to the products offcombustion under the oven bottoni to be vheated thereby. y y y y 2. An oven bottom having a recess and a spider thereinprovided with air jinlet means, a burner within the recess, and a cover platel on said` spider exposed therethrough forthe `contact of .products of combustion under the oven bottom. Y f y 3.A An oven bottom having Ian annular re-A cess and a Aspider therein, an annular gas burnerin said recess, said spider havingan air inlet and channels leading radially therefrom to the inner wall of said recess.

4:. An oven bottom having an annular recess and a spider therein, having an air inlet and radial channels leading from said inlet to said recess, an annular gas burner in said recess, and a cover plate on the spider eX- posed through the openings between the arms thereof Ato products of combustion under the oven bottom.

5. An oven bottom having an annular recess and a spider therein having a central air inlet opening and radial air channels leading from said opening to said recess, an annular gas burner in said recess, and a cover plate secured on the spider over said opening and channels tov deflect the air to the burner, said plate being exposed through the openings of the spider between the arms thereof to products of combustion under the oven bottoni.

6. An oven bottom having an annular recess and a spider therein provided with a central air inlet opening and radial channels leading from said opening through the inner wall of the recess, an annular gas burner within said recess, and a cover plate secured on the spider over said opening and channels and exposed through the openings of the spider between the arms thereof to products of combustion under the oven bottom, the edge of said plate projecting beyond the spider to overhang the, inner wall or' the recess and burner.

7. A stove or range having an oven therein, the bottom of which is provided with an annular recess and a spider therein having a central air inlet opening and air channels leading radially therefrom to said recess, an annular gas burner within the recess, and

an air inlet tube having its upper end engaging said spider in communication with said opening and its lower end opening through the bottom of the stove, said tube having a partition extending between the bottoms of the oven and stove and itting under said spider and recess.

8. An oven bottom having an annular ree cess and an opening surrounded by said recess, an annular gas burner Within said recess, a plate over said opening substantially flush with the oven bottom, and means for the entrance of air upwardly to and along the under side of said plate to said recess and i burner.

9. An oven bottom having an annular recess and an opening surrounded by said re'- cess, an annular gas burner within said recess, a plate over said opening substantially IHush with the oven bottom and having its edge overhanging said burner, and lneans for ,the entrance of air upwardly to and along the under side of said plate into said recess over the burner, said opening exposing said plate to products of combustion under the oven bottom to be heated thereby.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

HENRY LANGE.

Witnesses:

A. H. STORE, En SCHMUCK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

